/*
 * Copyright (C) 2001-2016 Food and Agriculture Organization of the
 * United Nations (FAO-UN), United Nations World Food Programme (WFP)
 * and United Nations Environment Programme (UNEP)
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or (at
 * your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
 *
 * Contact: Jeroen Ticheler - FAO - Viale delle Terme di Caracalla 2,
 * Rome - Italy. email: geonetwork@osgeo.org
 */

(function () {

  goog.provide('gn_olDecorateLayer')

  var module = angular.module('gn_olDecorateLayer', [])

  /**
   * Provides a function that adds properties (using
   * `Object.defineProperty`) to the layer, making it possible to control layer
   * properties with ngModel.
   *
   * Example:
   *
   *      <input type="checkbox" ngModel="layer.visible" />
   *
   * @ngdoc service
   * @ngname olDecorateLayer
   */


  /**
   * @param {ol.layer.Base} layer Layer to decorate.
   */
  var decorateLayer = function (layer) {

    Object.defineProperty(layer, 'visible', {
      configurable: true,
      get:
        /**
         * @return {boolean} Visible.
         */
        function () {
          return layer.getVisible()
        },
      set:
        /**
         * @param {boolean} val Visible.
         */
        function (val) {
          layer.setVisible(val)
        }
    })

    Object.defineProperty(layer, 'opacity', {
      configurable: true,
      get:
        /**
         * @return {string} Opacity.
         */
        function () {
          return (Math.round(layer.getOpacity() * 100) / 100) + ''
        },
      set:
        /**
         * @param {string} val Opacity.
         */
        function (val) {
          layer.setOpacity(+val)
        }
    })
  }

  module.value('olDecorateLayer', decorateLayer)
})()
